Red List Category
for more information about the Red List categories and criteria
Justification of Red List category
This species was formerly distributed across the north Atlantic, but is now Extinct as a result of hunting pressure. The last live bird was seen in 1852.
Land-mass type - continent - Continents are land masses > bigger than Australia (=7,682,300 sq km).
Land-mass type - oceanic island - Oceanic islands are islands or island groups that are <200,000 sq km in size and separated from other land masses by >200 m sea depth. Generally Oceanic islands are islands or island groups that are <200,000 sq km in size and separated from other land masses by >200 m sea depth. Generally they have never been connected to a continental area by a land-ridge, and are volcanic in origin.
Land-mass type - shelf island - Continental islands include all other islands or island groups. Generally they were once part of continents and lie on a continental shelf of < 200 m sea depth.
Realm - Nearctic - realm
Realm - Palearctic - realm
IUCN Ecosystem -- Marine biome